Syncing your inventory from QuickBooks Online (QBO) to your Shopify page isn't applicable. Let me discuss to you the details.
When you connect Shopify with QBO, it doesn't pull in inventory details. Instead, it gives you a summary of sales data based on payouts from Shopify Payments or ShopPay. You'll see categories like sales, shipping income, discounts, fees, and taxes.
Feel free to check out the article for more details, and don't forget to swing by the FAQs section for additional info: How Shopify works with QuickBooks Online.
With this in mind, you might want to explore a third-party app that can help you track inventory from both Shopify and QuickBooks: QuickBooks App Store. To get the best results, you can search with keywords and check out the reviews for great recommendations.
If you have any questions or need further assistance with any QuickBooks-related matters, don't hesitate to post to the Community. Stay safe!